a large number of important code-bases are written in Go,         proving that it's suitable for large scale software (docker,  kubernetes, prometheus, influxdb, tidb, cockroachdb - those are from memory.

Given some of the issues we've seen in the quality of the above mentioned software, I wouldn't be surprised if in the next couple years we see a lot of regret for being so gung-ho over Go (ala PHP in the early 2000s).